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EP1200749B1 - Linear roller bearing - Google Patents

Linear roller bearing Download PDF

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Publication number
EP1200749B1
EP1200749B1 EP00947952A EP00947952A EP1200749B1 EP 1200749 B1 EP1200749 B1 EP 1200749B1 EP 00947952 A EP00947952 A EP 00947952A EP 00947952 A EP00947952 A EP 00947952A EP 1200749 B1 EP1200749 B1 EP 1200749B1
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EP
European Patent Office
Prior art keywords
cage
load
guide rail
rolling bearing
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00947952A
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German (de)
French (fr)
Other versions
EP1200749A1 (en
Inventor
Klaus Baalmann
Uwe Danneck
Kai Jelinek
Udo Klein
Frank Scheib
Thomas Winkler
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IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
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Publication date
Application filed by INA Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1200749A1 publication Critical patent/EP1200749A1/en
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Publication of EP1200749B1 publication Critical patent/EP1200749B1/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00Bearings for parts moving only linearly
    • F16C29/04Ball or roller bearings
    • F16C29/06Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F16C29/069Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls whereby discrete load bearing elements, e.g. discrete load bearing plates or discrete rods, are provided in a retainer and form the load bearing tracks

Definitions

  • the invention relates to a linear roller bearing with several ball circulations, which a guide rail surrounding circumferentially arranged one behind the other are, in each case at least one ball circulation, consisting of a Carrying section, a return section and two of these sections with each other connecting deflecting sections, is held in a cage segment housing, which is formed by an inner cage part and an outer cage part and a suitably inserted in a breakthrough of the outer cage part supporting track element contains, further wherein the balls of the support portion on the one hand a track of the supporting track element and on the other hand by a slot the inner cage part protruding on the guide rail in the longitudinal direction thereof are supported roll-off.
  • Such a bearing has an optimal adjustment of the ball race itself during operation changing conditions, such as deflections, and also to locally different conditions, such.
  • the balls, the track elements and also the ball return tracks always adjust in sync with the guide rail, so that the advantages of a low displacement and a low noise, hakelok and wear-resistant bearing arise, which largely is maintenance-free.
  • a linear roller bearing of the type mentioned for the movement along a Wave is apparent from the document WO 97/01 713.
  • the invention has for its object to provide a bearing which it allows single cage segment housings to be inserted into the bearing or there replace when it is with the guide rail in the assembled state is located without the optimal positioning of the cage segment housing on the Guide rail, their mobility or their holding function during transport too affect.
  • each Käfigsegmentgephase individually in a recess of a surrounding the guide rail circular cylindrical cage sleeve in the radial direction can be used and removed is arranged.
  • the cage sleeve has access from the outer circumference Recesses, so in each case a cage segment housing radially to Guide rail can be inserted towards.
  • the inner cage part can at its two in the longitudinal direction of the guide rail pointing end faces each have a protruding knob, which in an associated recess of the cage sleeve is engaged.
  • This is the individual cage segment housings have been suspended in the cage sleeve that they are independent of each other freely movable. The suspension of the housing in the cage sleeve takes place with the knobs in the space provided recesses.
  • the cage sleeve can project into the respective recess, in radial Direction of the sleeve on the latched knob acting spring lip.
  • the spring lip presses the cage segment housing also in the unloaded State of the guide rail, so that the housing a defined Position is given. In case of load changes or sudden use of the Operating load are all cage segment housing then properly aligned. In particular, rattling of the bearing parts can thus be avoided.
  • the individual housings can, as shown in the drawing, each order an imaginary axis A-A, through the two associated recesses for the pimples runs, completely (by 360 °) to be mobile.
  • Your mobility about an imaginary axis B-B, starting radially from the guide rail centrally through the support element runs (axial alignment) is limited as well their mobility around an imaginary axis C-C, the tangential to the guide rail runs centrally through the respective support member element. In the radial direction of the guide rail, the mobility is also limited. It is partly given or restricted by the fact that the Recesses have a larger diameter than the inserting in it Nubs.
  • the Tragbahnelement not only needs to be einrillig. At it can itself There are also several parallel raceways for balls of support sections.
  • a simplified manufacture and assembly of the cage segment housing is achieved in that in each case the outer cage part of the cage segment housing is formed as molded on the support member element plastic part.
  • From an outer cage part and an inner cage portion existing cage segment housing as one piece To spray plastic part on the supporting track element. By spraying or molding reduces the number of parts to be assembled.
  • the cage sleeve may have two end rings extending in the longitudinal direction the guide rail vertical planes extend, with at each end ring formed pairs of substantially parallel, forming resilient areas Slits, each cage segment housing at its two in the longitudinal direction the guide rail facing end faces of two corresponding ones resilient areas of the two end rings is held.
  • the cage segment housings may be provided with openings in the resilient ones Regions inserted inserted frontal knobs held in the cage sleeve be.
  • the cage segment housing with frontal Adhesive or welding surfaces attached to the resilient portions of the cage sleeve are.
  • the cage segment housing each in the region of a support portion of the Balls and / or a return portion of the balls usable as a grease reservoir Have cavities.
  • a durable cohesion of the cage segment housing is also characterized achieved in that the inner cage part has lateral recesses, in which lateral nubs of the inserted into the inner cage part outer cage part are engaged.
  • a linear roller bearing according to the invention contains a cage sleeve 1, which has a Guide rail 2 surrounds.
  • the guide rail 2 is circular in cross section formed and the cage sleeve 1 is a cylinder body, which at his Has circumferentially five equal recesses 3, extending in the circumferential direction in Intervals are in a row.
  • These recesses 3 are radially continuous executed, so that parallel cage bars 4 result, the two end rings 5 of the cage sleeve 1 connect together.
  • each recess 3 of the cage sleeve 1 is a cage segment housing 6, as in 5, or a cage segment housing 7, as shown in FIG. 6, used.
  • Each cage segment housing contains two endless recirculating ball bearings.
  • Figure 1 shows the parts of the cage segment housing 7.
  • support balls 8 of the support section of a circulation both on the guide rail 2 and on one in the cage segment housing inserted support member 9 and can in the longitudinal direction unroll the guide rail 2 and the support track element.
  • Purpose 9 raceways 10 are incorporated in the support element, such as From Figures 5 and 6 shows.
  • Each cage segment housing 6 or 7 consists of an inner cage part 11 and an outer cage part 12 inserted therein. These parts are also like the cage sleeve 1, plastic parts and contain channels for receiving two ball circulations, ie of balls 8 of the support sections of balls 13 of Return sections and balls of the deflection sections.
  • Each inner cage part 11 has two in the longitudinal direction of the guide rail 2 extending Slits 14 through which the balls 8 of the support sections protrude, to touch the surface of the guide rail 2 can. That I likewise in the longitudinal direction of the guide rail 2 extending supporting track element 9 is arranged in an opening of the outer cage part 12 and there held.
  • Each cage segment housing 6 and 7 is in its recess 3 of the cage sleeve 1 slightly hinged, so that the balls 8 of the support sections and the supporting track elements 9 on the surface and the course can adjust the guide rail 2 during the rolling motion.
  • the inner cage part 11 at each end face a protruding Nub 19 on, both knobs 19 of an inner cage part 11 are arranged in alignment.
  • the end rings 5 of the cage sleeve 1 aligned recesses 20. These are larger in diameter executed as the knobs 19, so that this also an adjustment of the entire cage segment housing 6 or 7 within the cage sleeve 1 given is.
  • the possibilities of movement the cage segment housing are shown in Figure 1 by the Axes A-A, B-B, C-C shown.
  • FIG. 7 shows a front ring 24 a Cage sleeve in which the resilient portions 22 each of an inner slot 25 and a substantially parallel outer slot 26 formed becomes.
  • Each resilient region 22 has in the middle an opening 27 into which a nub 19 of the adjacent cage segment housing 6 or 7 inserted is.
  • the end rings 28 of Figure 8 a cage sleeve are substantially also designed, because the resilient regions 23 are also here bounded by inner slots 25 and outer slots 26.
  • the Connection of the cage segment housing 6 or 7 with the end rings 28 thereby created that the cage segment housing at the resilient regions 23rd glued or welded.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft ein Linearwälzlager mit mehreren Kugelumläufen, welche eine Führungsschiene umgebend in Umfangsrichtung hintereinander angeordnet sind, wobei jeweils mindestens ein Kugelumlauf, bestehend aus einem Tragabschnitt, einem Rücklaufabschnitt und zwei diese Abschnitte miteinander verbindenden Umlenkabschnitten, in einem Käfigsegmentgehäuse gehalten ist, das von einem inneren Käfigteil und einem äußeren Käfigteil gebildet ist und ein in einem Durchbruch des äußeren Käfigteils passend eingesetztes Tragbahnelement enthält, wobei ferner die Kugeln des Tragabschnitts einerseits an einer Laufbahn des Tragbahnelementes und andererseits durch einen Schlitz des inneren Käfigteils hindurchragend an der Führungsschiene in deren Längsrichtung abrollbar abgestützt sind.The invention relates to a linear roller bearing with several ball circulations, which a guide rail surrounding circumferentially arranged one behind the other are, in each case at least one ball circulation, consisting of a Carrying section, a return section and two of these sections with each other connecting deflecting sections, is held in a cage segment housing, which is formed by an inner cage part and an outer cage part and a suitably inserted in a breakthrough of the outer cage part supporting track element contains, further wherein the balls of the support portion on the one hand a track of the supporting track element and on the other hand by a slot the inner cage part protruding on the guide rail in the longitudinal direction thereof are supported roll-off.

Ein solches Lager besitzt eine optimale Anpassung des Kugellaufs an sich während des Betriebes verändernde Bedingungen, wie Durchbiegungen, und auch an lokal unterschiedliche Bedingungen, wie z. B. Unrundheit der Führungsschiene. Die Kugeln, die Tragbahnelemente und auch die Kugelrückführungsbahnen stellen sich hierbei immer synchron zur Führungsschiene ein, so daß sich die Vorteile einer geringen Verschiebekraft und eines geräuscharm, hakelfrei und verschleißarm arbeitenden Lagers ergeben, welches weitgehend wartungsfrei ist.Such a bearing has an optimal adjustment of the ball race itself during operation changing conditions, such as deflections, and also to locally different conditions, such. B. Out of roundness of the guide rail. The balls, the track elements and also the ball return tracks always adjust in sync with the guide rail, so that the advantages of a low displacement and a low noise, hakelfrei and wear-resistant bearing arise, which largely is maintenance-free.

Hintergrund der ErfindungBackground of the invention

Ein Linearwälzlager der eingangs genannten Art für die Bewegung längs einer Welle geht aus dem Dokument WO 97/01 713 hervor. Dort grenzen drei Käfigsegmentgehäuse in Umfangsrichtung unmittelbar aneinander an und benötigen ineinander eingreifbare Strukturen ihrer angrenzenden Berührungsflächen. A linear roller bearing of the type mentioned for the movement along a Wave is apparent from the document WO 97/01 713. There are three cage segment housings in the circumferential direction directly to each other and need interlocking structures of their adjacent interfaces.

Beim Herausnehmen eines Käfigsegmentgehäuses verlieren daher die übrigen beiden Gehäuse ihren festen Halt in Umfangsrichtung.When removing a cage segment housing therefore lose the rest both housings their firm grip in the circumferential direction.

Aus dem Dokument DE 42 10 039 A1 ist ebenfalls ein Linearwälzlager bekannt, bei welchem mehrere Käfigsegmentgehäuse in Umfangsrichtung einer Führungsschiene hintereinander angeordnet sind und unmittelbar aneinander angrenzen. Um eine Einstellbarkeit der Tragbahnelemente auf die Führungsschiene zu ermöglichen, weisen die in Umfangsrichtung aufeinander folgenden Käfigsegmentgehäuse federnde Zungen auf, mit welchen sie einander gegenüber nachgiebig sich einstellend abgestützt sind. Für den Zusammenhalt aller Käfigsegmentgehäuse sind hier zwei stirnseitig angeordnete ringförmige Halteelemente erforderlich. Auch bei dieser Ausführung verlieren daher beim Entfernen der Halteelemente und Herausnehmen eines Käfigsegmentgehäuses die übrigen Gehäuse ihren festen Halt. Das Auswechseln eines einzelnen Gehäuses ist daher erschwert.From the document DE 42 10 039 A1 also a linear roller bearing is known, in which a plurality of cage segment housing in the circumferential direction of a guide rail are arranged one behind the other and immediately adjacent to each other. To adjust the support track elements on the guide rail to allow the sequentially in the circumferential direction Cage segment housing resilient tongues with which they face each other yieldingly supported. For the cohesion of all Cage segment housing here are two frontally arranged annular retaining elements required. Also in this embodiment therefore lose when removing the holding elements and removing a cage segment housing the rest of the housings have a firm hold. Replacing a single housing is therefore difficult.

Das Dokument WO 98/21 494 zeigt eine einstückige Käfighülse mit von außen zugänglichen Räumen für die Unterbringung von Kugelumläufen und Tragbahnelementen, so daß hier die Möglichkeit, einzelne Kugelumläufe mit ihren Laufbahnen in einfacher Weise auszuwechseln, nicht gegeben ist.The document WO 98/21 494 shows a one-piece cage sleeve with from the outside accessible spaces for the accommodation of recirculating ball and supporting track elements, so here is the possibility of individual ball circulation with their Replacing raceways in a simple way, is not given.

Zusammenfassung der ErfindungSummary of the invention

Der Erfindung liegt die Aufgabe zugrunde, ein Lager zu schaffen, welches es ermöglicht, einzelne Käfigsegmentgehäuse in das Lager einzusetzen oder dort auszuwechseln, wenn es sich mit der Führungsschiene im montierten Zustand befindet, ohne die optimale Positionierung der Käfigsegmentgehäuse auf der Führungsschiene, ihre Beweglichkeit oder ihre Haltefunktion beim Transport zu beeinträchtigen.The invention has for its object to provide a bearing which it allows single cage segment housings to be inserted into the bearing or there replace when it is with the guide rail in the assembled state is located without the optimal positioning of the cage segment housing on the Guide rail, their mobility or their holding function during transport too affect.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß jedes Käfigsegmentgehäuse einzeln in einer Ausnehmung einer die Führungsschiene umgebenden kreiszylindrischen Käfighülse in radialer Richtung einsetzbar und herausnehmbar angeordnet ist. Die Käfighülse besitzt vom Außenumfang zugängliche Ausnehmungen, in die also jeweils ein Käfigsegmentgehäuse radial zur Führungsschiene hin eingesetzt werden kann.This object is achieved in that each Käfigsegmentgehäuse individually in a recess of a surrounding the guide rail circular cylindrical cage sleeve in the radial direction can be used and removed is arranged. The cage sleeve has access from the outer circumference Recesses, so in each case a cage segment housing radially to Guide rail can be inserted towards.

Das innere Käfigteil kann an seinen beiden in Längsrichtung der Führungsschiene weisenden Stirnseiten je eine abstehende Noppe aufweisen, welche in einer ihr zugeordneten Aussparung der Käfighülse eingerastet ist. Damit sind die einzelnen Käfigsegmentgehäuse in die Käfighülse so eingehängt worden, daß sie voneinander unabhängig frei beweglich sind. Die Einhängung der Gehäuse in die Käfighülse erfolgt mit den Noppen in die dafür vorgesehenen Aussparungen.The inner cage part can at its two in the longitudinal direction of the guide rail pointing end faces each have a protruding knob, which in an associated recess of the cage sleeve is engaged. This is the individual cage segment housings have been suspended in the cage sleeve that they are independent of each other freely movable. The suspension of the housing in the cage sleeve takes place with the knobs in the space provided recesses.

Die Käfighülse kann eine in die jeweilige Aussparung hineinragende, in radialer Richtung der Hülse auf die eingerastete Noppe einwirkende Federlippe aufweisen. Die Federlippe drückt jeweils das Käfigsegmentgehäuse auch im unbelasteten Zustand an die Führungsschiene, so daß dem Gehäuse eine definierte Stellung vorgegeben wird. Bei Lastwechseln oder beim plötzlichen Einsatz der Betriebslast sind alle Käfigsegmentgehäuse dann schon richtig ausgerichtet. Insbesondere kann damit auch ein Klappern der Lagerteile vermieden werden.The cage sleeve can project into the respective recess, in radial Direction of the sleeve on the latched knob acting spring lip. The spring lip presses the cage segment housing also in the unloaded State of the guide rail, so that the housing a defined Position is given. In case of load changes or sudden use of the Operating load are all cage segment housing then properly aligned. In particular, rattling of the bearing parts can thus be avoided.

Die einzelnen Gehäuse können, wie aus der Zeichnung hervorgeht, jeweils um eine gedachte Achse A-A, die durch die beiden zugehörigen Aussparungen für die Noppen verläuft, vollständig (um 360°) beweglich sein. Ihre Beweglichkeit um eine gedachte Achse B-B, die radial von der Führungsschiene ausgehend zentral durch das Tragbahnelement verläuft (axiale Ausrichtung) ist eingeschränkt, ebenso ihre Beweglichkeit um eine gedachte Achse C-C, die tangential zur Führungsschiene mittig durch das jeweilige Tragbahnelement verläuft. In radialer Richtung der Führungsschiene ist die Beweglichkeit ebenfalls eingeschränkt. Sie ist teilweise dadurch gegeben bzw. eingeschränkt, daß die Aussparungen einen größeren Durchmesser haben als die sich darin einlegenden Noppen. Über die Kraftwirkungskette "belastete Kugeln - Tragbahnelement - Käfigsegmentgehäuse - unbelastete Kugeln" stellt sich jedes einzelne Gehäuse völlig unabhängig von den anderen Segmentgehäusen auf die Führungsschiene ein. Da sich die einzelnen Segmentgehäuse jeweils so bewegen können, daß sie sich an den Verlauf der Führungsschiene anpassen, entsteht gleichzeitig eine Relativbewegung der Käfigsegmentgehäuse in bezug auf ein die Käfighülse aufnehmendes, zu bewegendes Maschinengehäuse. Dies wird dadurch ermöglicht, daß die Tragbahnelemente einen in zwei Richtungen gerundeten Rücken haben und damit auf der Bohrungsinnenfläche des Maschinengehäuse abrollen können, in welchem sie sich befinden.The individual housings can, as shown in the drawing, each order an imaginary axis A-A, through the two associated recesses for the pimples runs, completely (by 360 °) to be mobile. Your mobility about an imaginary axis B-B, starting radially from the guide rail centrally through the support element runs (axial alignment) is limited as well their mobility around an imaginary axis C-C, the tangential to the guide rail runs centrally through the respective support member element. In the radial direction of the guide rail, the mobility is also limited. It is partly given or restricted by the fact that the Recesses have a larger diameter than the inserting in it Nubs. About the force chain "loaded balls - Tragbahnelement - Caged segment housing - unloaded balls "every single one arises Housing completely independent of the other segment housings on the guide rail one. Since the individual segment housings move in this way can, that they adapt to the course of the guide rail arises at the same time a relative movement of the cage segment housing with respect to a the cage sleeve receiving, to be moved machine housing. this will characterized in that the support track elements rounded in two directions Have back and thus on the bore inner surface of the machine housing can roll in which they are located.

Das Tragbahnelement braucht nicht nur einrillig zu sein. An ihm können sich auch mehrere parallele Laufbahnen für Kugeln von Tragabschnitten befinden. Eine vereinfachte Herstellung und Montage der Käfigsegmentgehäuse wird dadurch erreicht, daß jeweils das äußere Käfigteil des Käfigsegmentgehäuses als an dem Tragbahnelement angespritztes Kunststoffteil ausgebildet ist. Durch den exakt definierten Sitz des Tragbahnelementes im Segmentgehäuse ergibt sich ein verbesserter Kugelumlauf (geringere Geräuschentwicklung), eine genaue stoßfreie Führung der Kugeln beim Eintritt in den belasteten Bereich und eine Reduzierung der Verschiebekraftpulsation. Es ist dadurch nicht mehr notwendig, an den Enden der Tragbahnelemente spezielle Einlaufgeometrien (Einlaufphasen) auszubilden. Es ist auch möglich, das aus einem äußeren Käfigteil und einem inneren Käfigteil bestehende Käfigsegmentgehäuse als einstückiges Kunststoffteil an dem Tragbahnelement anzuspritzen. Durch ein Anspritzen oder Anformen vermindert sich die Anzahl der zu montierenden Teile.The Tragbahnelement not only needs to be einrillig. At it can itself There are also several parallel raceways for balls of support sections. A simplified manufacture and assembly of the cage segment housing is achieved in that in each case the outer cage part of the cage segment housing is formed as molded on the support member element plastic part. By gives the exact defined seat of the supporting track element in the segment housing an improved recirculating ball (lower noise), an accurate bump-free guidance of the balls when entering the loaded area and a reduction of the displacement force pulsation. It is therefore no longer necessary at the ends of the supporting track elements special inlet geometries (Start-up phases). It is also possible that from an outer cage part and an inner cage portion existing cage segment housing as one piece To spray plastic part on the supporting track element. By spraying or molding reduces the number of parts to be assembled.

Durch die Einteiligkeit von Tragbahnelement und Käfigsegmentgehäuse liegt eine kraftschlüssige Verbindung vor, die es ermöglicht, Teile der Kugelumlenkung, die im angespritzten Kunststoffteil ausgebildet sind, in den lasttragenden Bereich mit einzubeziehen. So kann der Übergang "Kugelumlenkung - Tragbahnelement" in radialer Richtung zur Führungsschiene so ausgebildet werden, daß im unbelasteten Zustand im Kunststoffteil eine gegenüber dem Tragbahnelement erhöhte Stufe oder Rampe entsteht. Diese muß so dimensioniert sein, daß bei Berücksichtigung der unterschiedlichen Eindringtiefen der Kugeln in Stahl und Kunststoff die Stufe oder Rampe unter Belastung verschwindet.Due to the one-piece design of support element and cage segment housing a non-positive connection, which allows parts of the ball deflection, which are formed in the molded plastic part, in the load-bearing Include area. So the transition "ball deflection - Tragbahnelement" be formed in the radial direction to the guide rail so that in the unloaded state in the plastic part one opposite the supporting track element increased level or ramp arises. This must be dimensioned so be that taking into account the different penetration depths of the balls in steel and plastic the stage or ramp disappears under load.

Die Käfighülse kann zwei Stirnringe aufweisen, die sich in zur Längsrichtung der Führungsschiene senkrechten Ebenen erstrecken, mit an jedem Stirnring ausgebildeten Paaren von im wesentlichen parallen, federnde Bereiche bildenden Schlitzen, wobei jedes Käfigsegmentgehäuse an seinen beiden in Längsrichtung der Führungsschiene weisenden Stirnseiten von zwei einander entsprechenden federnden Bereichen der beiden Stirnringe gehalten ist. Dabei können die Käfigsegmentgehäuse beispielsweise mit in Öffnungen der federnden Bereiche eingesteckten stirnseitigen Noppen in der Käfighülse gehalten sein. Es ist aber auch möglich, daß die Käfigsegmentgehäuse mit stirnseitigen Klebe- oder Schweißflächen an den federnden Bereichen der Käfighülse befestigt sind. Auf diese Weise erhält man ein System zur Einbringung der Käfigsegmentgehäuse in die Käfighülse, welches die Beweglichkeit der einzelnen Gehäuse ermöglicht und eine Verdrehsicherung bietet, so daß die Gehäuse immer in definierter Stellung sind, bevor die gefüllte Käfighülse auf die Führungsschiene geschoben wird. Außerdem wirkt das System spielfrei und ermöglicht eine definierte Vorspannung der Käfigsegmentgehäuse. Dabei werden die Gehäuse zur Führungsschiene hin oder von der Führungsschiene weg zu dem die Käfighülse aufnehmenden Maschinengehäuse hin angefedert.The cage sleeve may have two end rings extending in the longitudinal direction the guide rail vertical planes extend, with at each end ring formed pairs of substantially parallel, forming resilient areas Slits, each cage segment housing at its two in the longitudinal direction the guide rail facing end faces of two corresponding ones resilient areas of the two end rings is held. there For example, the cage segment housings may be provided with openings in the resilient ones Regions inserted inserted frontal knobs held in the cage sleeve be. But it is also possible that the cage segment housing with frontal Adhesive or welding surfaces attached to the resilient portions of the cage sleeve are. In this way, one obtains a system for introducing the cage segment housing in the cage sleeve, which the mobility of the individual Housing allows and provides an anti-rotation, so that the housing always in a defined position, before the filled cage sleeve on the guide rail is pushed. In addition, the system is free of play and allows a defined bias of the cage segment housing. It will be the housing to the guide rail towards or away from the guide rail to the spring loaded the cage sleeve receiving machine housing.

Um ein wartungsfreies bzw. wartungsarmes Linearwälzlager zu erhalten, können die Käfigsegmentgehäuse jeweils im Bereich eines Tragabschnitts der Kugeln und/oder eines Rücklaufabschnitts der Kugeln als Fettreservoir verwendbare Hohlräume aufweisen.In order to obtain a maintenance-free or low-maintenance linear rolling bearing, can the cage segment housing each in the region of a support portion of the Balls and / or a return portion of the balls usable as a grease reservoir Have cavities.

Ein dauerfester Zusammenhalt des Käfigsegmentgehäuses wird auch dadurch erreicht, daß das innere Käfigteil seitliche Aussparungen aufweist, in welche seitliche Noppen des in das innere Käfigteil eingesteckten äußeren Käfigteils eingerastet sind.A durable cohesion of the cage segment housing is also characterized achieved in that the inner cage part has lateral recesses, in which lateral nubs of the inserted into the inner cage part outer cage part are engaged.

Kurze Beschreibung der ZeichnungShort description of the drawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen

Figur 1
ein erfindungsgemäßes Linearwälzlager in explosionsartiger perspektivischer Darstellung;
Figur 2
eine Käfighülse des Lagers in einer Seitenansicht;
Figur 3
einen Querschnitt durch die Käfighülse gemäß Linie III-III der Figur 2;
Figur 4
eine vergrößerte Darstellung des Bereichs einer mit einer Federlippe versehenen Aussparung der Käfighülse;
Figur 5
ein Käfigsegmentgehäuse, welches an einer Führungsschiene abgestützt ist, im Querschnitt;
Figur 6
ein gegenüber Figur 5 abgewandeltes Käfigsegmentgehäuse im Querschnitt;
Figur 7
eine gegenüber Figur 3 abgewandelte Käfighülse in stirnseitiger Ansicht;
Figur 8
eine weitere gegenüber Figur 3 abgewandelte Käfighülse in stirnseitiger Ansicht.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it
FIG. 1
an inventive linear roller bearing in explosive perspective view;
FIG. 2
a cage sleeve of the bearing in a side view;
FIG. 3
a cross section through the cage sleeve according to line III-III of Figure 2;
FIG. 4
an enlarged view of the area of a provided with a spring lip recess of the cage sleeve;
FIG. 5
a cage segment housing, which is supported on a guide rail, in cross section;
FIG. 6
a comparison with Figure 5 modified cage segment housing in cross section;
FIG. 7
a comparison with Figure 3 modified cage sleeve in frontal view;
FIG. 8
another compared to Figure 3 modified cage sleeve in frontal view.

Ausführliche Beschreibung der ZeichnungDetailed description of the drawing

Ein erfindungsgemäßes Linearwälzlager enhält eine Käfighülse 1, welche eine Führungsschiene 2 umgibt. Die Führungsschiene 2 ist im Querschnitt kreisförmig ausgebildet und die Käfighülse 1 ist ein Zylinderkörper, der an seinem Umfang fünf gleiche Ausnehmungen 3 aufweist, die sich in Umfangsrichtung in Abständen hintereinander befinden. Diese Ausnehmungen 3 sind radial durchgehend ausgeführt, so daß sich parallele Käfigstäbe 4 ergeben, die zwei Stirnringe 5 der Käfighülse 1 miteinander verbinden.A linear roller bearing according to the invention contains a cage sleeve 1, which has a Guide rail 2 surrounds. The guide rail 2 is circular in cross section formed and the cage sleeve 1 is a cylinder body, which at his Has circumferentially five equal recesses 3, extending in the circumferential direction in Intervals are in a row. These recesses 3 are radially continuous executed, so that parallel cage bars 4 result, the two end rings 5 of the cage sleeve 1 connect together.

In jede Ausnehmung 3 der Käfighülse 1 ist ein Käfigsegmentgehäuse 6, wie in Figur 5 dargestellt, oder ein Käfigsegmentgehäuse 7, wie in Figur 6 dargestellt, eingesetzt. Jedes Käfigsegmentgehäuse enthält zwei endlose Kugelumläufe. Figur 1 zeigt die Teile des Käfigsegmentgehäuses 7. Bei beiden Käfigsegmentgehäusen 6 und 7 stützen sich Kugeln 8 des Tragabschnitts eines Umlaufes sowohl an der Führungsschiene 2 als auch an einem in dem Käfigsegmentgehäuse eingesetzten Tragbahnelement 9 ab und können in Längsrichtung der Führungsschiene 2 sowie des Tragbahnelementes abrollen. Zu diesem Zweck sind in dem Tragbahnelement 9 Laufbahnen 10 eingearbeitet, wie aus den Figuren 5 und 6 hervorgeht.In each recess 3 of the cage sleeve 1 is a cage segment housing 6, as in 5, or a cage segment housing 7, as shown in FIG. 6, used. Each cage segment housing contains two endless recirculating ball bearings. Figure 1 shows the parts of the cage segment housing 7. In both Käfegsegmentgehäusen 6 and 7 support balls 8 of the support section of a circulation both on the guide rail 2 and on one in the cage segment housing inserted support member 9 and can in the longitudinal direction unroll the guide rail 2 and the support track element. To this Purpose 9 raceways 10 are incorporated in the support element, such as From Figures 5 and 6 shows.

Jedes Käfigsegmentgehäuse 6 bzw. 7 besteht aus einem inneren Käfigteil 11 und einem darin eingesetzten äußeren Käfigteil 12. Diese Teile sind ebenso, wie die Käfighülse 1, Kunststoffteile und enthalten Kanäle zur Aufnahme von zwei Kugelumläufen, also von Kugeln 8 der Tragabschnitte, von Kugeln 13 der Rücklaufabschnitte und von Kugeln der Umlenkabschnitte. Jedes innere Käfigteil 11 weist zwei in Längsrichtung der Führungsschiene 2 sich erstreckende Schlitze 14 auf, durch welche die Kugeln 8 der Tragabschnitte hindurchragen, um die Oberfläche der Führungsschiene 2 berühren zu können. Das sich ebenfalls in Längsrichtung der Führungsschiene 2 erstreckende Tragbahnelement 9 ist in einem Durchbruch des äußeren Käfigteils 12 angeordnet und dort gehalten. Wie aus Figur 6 hervorgeht, sind das innere Käfigteil 11 und das äußere Käfigteil 12 dadurch zusammengehalten, daß an den Längsseiten des inneren Käfigteils 11 seitliche Aussparungen 15 vorgesehen sind, in welchen seitliche Noppen 16 des äußeren Käfigteils 12 eingerastet sind. Diese Ausführung weist außerdem einen in Längsrichtung verlaufenden Hohlraum 17 im Bereich der Tragabschnitte und Hohlräume 18 in den Bereichen der Rücklaufabschnitte der Kugelumläufe auf. Diese Hohlräume dienen zur Aufnahme von Schmierstoff für die abrollenden Kugeln 8 bzw. 13.Each cage segment housing 6 or 7 consists of an inner cage part 11 and an outer cage part 12 inserted therein. These parts are also like the cage sleeve 1, plastic parts and contain channels for receiving two ball circulations, ie of balls 8 of the support sections of balls 13 of Return sections and balls of the deflection sections. Each inner cage part 11 has two in the longitudinal direction of the guide rail 2 extending Slits 14 through which the balls 8 of the support sections protrude, to touch the surface of the guide rail 2 can. That I likewise in the longitudinal direction of the guide rail 2 extending supporting track element 9 is arranged in an opening of the outer cage part 12 and there held. As is apparent from Figure 6, the inner cage part 11 and the outer cage part 12 held together by the fact that on the longitudinal sides of the inner cage portion 11 side recesses 15 are provided, in which lateral knobs 16 of the outer cage part 12 are engaged. This execution also has a longitudinally extending cavity 17 in the Area of the support sections and cavities 18 in the areas of the return sections the ball rounds on. These cavities serve to accommodate Lubricant for the rolling balls 8 and 13 respectively.

Jedes Käfigsegmentgehäuse 6 bzw. 7 ist in seiner Ausnehmung 3 der Käfighülse 1 geringfügig schwenkbar eingehängt, damit die Kugeln 8 der Tragabschnitte und die Tragbahnelemente 9 sich auf die Oberfläche und den Verlauf der Führungschiene 2 während der Abrollbewegung einstellen können. Zu diesem Zweck weist das innere Käfigteil 11 an jeder Stirnseite eine abstehende Noppe 19 auf, beide Noppen 19 eines inneren Käfigteils 11 sind fluchtend angeordnet. Zur Aufnahme dieser Noppen 19 weisen die Stirnringe 5 der Käfighülse 1 fluchtende Aussparungen 20 auf. Diese sind im Durchmesser größer ausgeführt als die Noppen 19, so daß auch hierdurch eine Einstellmöglichkeit des gesamten Käfigsegmentgehäuses 6 bzw. 7 innerhalb der Käfighülse 1 gegeben ist. Wie Figur 4 zeigt, kann in eine Aussparung 20 jeweils eine Federlippe 21 hineinragen, welche auf das Käfigsegmentgehäuse 6 bzw. 7 über die Noppen 19 radial zur Führungsschiene 2 hin einwirkt oder auf das Käfigsegmentgehäuse eine Kraft in der entgegengesetzten Richtung ausübt. Die Bewegungsmöglichkeiten der Käfigsegmentgehäuse sind in Figur 1 durch die Achsen A-A, B-B, C-C dargestellt.Each cage segment housing 6 and 7 is in its recess 3 of the cage sleeve 1 slightly hinged, so that the balls 8 of the support sections and the supporting track elements 9 on the surface and the course can adjust the guide rail 2 during the rolling motion. To this Purpose, the inner cage part 11 at each end face a protruding Nub 19 on, both knobs 19 of an inner cage part 11 are arranged in alignment. To accommodate these nubs 19, the end rings 5 of the cage sleeve 1 aligned recesses 20. These are larger in diameter executed as the knobs 19, so that this also an adjustment of the entire cage segment housing 6 or 7 within the cage sleeve 1 given is. As Figure 4 shows, in a recess 20 each have a spring lip 21 protrude, which on the cage segment housing 6 and 7 on the Knobs 19 acts radially towards the guide rail 2 or on the cage segment housing exerts a force in the opposite direction. The possibilities of movement the cage segment housing are shown in Figure 1 by the Axes A-A, B-B, C-C shown.

Die geringfügig bewegliche Einhängung der Käfigsegmentgehäuse 6 bzw. 7 in der Käfighülse 1 kann gemäß den Figuren 7 und 8 auch dadurch erfolgen, daß in die Stirnringe der Käfighülse 1 Schlitze eingebracht werden, so daß sich federnde Bereiche 22 und 23 ergeben. So zeigt Figur 7 einen Stirnring 24 einer Käfighülse, in dem die federnde Bereiche 22 jeweils von einem inneren Schlitz 25 und einem dazu im wesentlichen parallelen äußeren Schlitz 26 gebildet wird. Jeder federnde Bereich 22 weist in der Mitte eine Öffnung 27 auf, in welche eine Noppe 19 des benachbarten Käfigsegmentgehäuses 6 bzw. 7 eingesteckt ist. Die Stirnringe 28 gemäß Figur 8 einer Käfighülse sind im wesentlichen ebenso gestaltet, denn die federnden Bereiche 23 werden hier ebenfalls von inneren Schlitzen 25 und äußeren Schlitzen 26 begrenzt. Hier wird die Verbindung der Käfigsegmentgehäuse 6 bzw. 7 mit den Stirnringen 28 dadurch geschaffen, daß die Käfigsegmentgehäuse an den federnden Bereichen 23 angeklebt oder angeschweißt werden. The slightly movable suspension of the cage segment housing 6 or 7 in the cage sleeve 1 can also take place according to the figures 7 and 8 in that Slots are placed in the end rings of the cage sleeve 1 so that resilient areas 22 and 23 result. Thus, Figure 7 shows a front ring 24 a Cage sleeve in which the resilient portions 22 each of an inner slot 25 and a substantially parallel outer slot 26 formed becomes. Each resilient region 22 has in the middle an opening 27 into which a nub 19 of the adjacent cage segment housing 6 or 7 inserted is. The end rings 28 of Figure 8 a cage sleeve are substantially also designed, because the resilient regions 23 are also here bounded by inner slots 25 and outer slots 26. Here is the Connection of the cage segment housing 6 or 7 with the end rings 28 thereby created that the cage segment housing at the resilient regions 23rd glued or welded.

BezugszahlenlisteLIST OF REFERENCE NUMBERS

11
Käfighülsecage bushing
22
Führungsschieneguide rail
33
Ausnehmungrecess
44
Käfigstabcage bar
55
Stirnringend ring
66
KäfigsegmentgehäuseCage segment housing
77
KäfigsegmentgehäuseCage segment housing
88th
Kugel des TragabschnittsBall of the support section
99
TragbahnelementSupporting race element
1010
Laufbahncareer
1111
inneres Käfigteilinner cage part
1212
äußeres Käfigteilouter cage part
1313
Kugel des RücklaufabschnittsBall of the return section
1414
Schlitzslot
1515
seitliche Aussparunglateral recess
1616
seitliche Noppelateral knob
1717
Hohlraumcavity
1818
Hohlraumcavity
1919
Noppeburl
2020
Aussparungrecess
2121
Federlippespring lip
2222
federnder Bereichresilient area
2323
federnder Bereichresilient area
2424
Stirnringend ring
2525
innerer Schlitzinner slot
2626
äußerer Schlitzouter slot
2727
Öffnungopening
2828
Stirnringend ring
A-AA-A
Achseaxis
B-BB-B
Achseaxis
C-CC-C
Achseaxis

Claims (11)

  1. Linear rolling bearing comprising a plurality of ball circuits which are arranged around a guide rail (2) behind one another in peripheral direction, at least one ball circuit consisting of a load-bearing section, a returning section and two deflecting sections that connect these sections to each other being retained in each segmental cage housing (6, 7) that is formed by an inner cage part (11) and an outer cage part (12) and contains a load-bearing raceway element (9) that is fitted into a through-aperture of the outer cage part (12), the balls (8) of the load-bearing section being supported on one side on a raceway (10) of the load-bearing raceway element (9) and on the other side, while projecting through a slot (14) of the inner cage part (11), on the guide rail (2) for rolling in the longitudinal direction thereof, characterised in that each segmental cage housing (6, 7) is arranged separately in a recess (3) of a circular cylindrical cage bushing (1) that surrounds the guide rail (2), and each segmental cage (6, 7) housing can be inserted into and removed from said recess in radial direction.
  2. Rolling bearing according to claim 1, characterised in that the inner cage part (11) comprises, on each of its two ends pointing in the longitudinal direction of the guide rail (2), a protruding knob (19) that is snapped into an associated recess (20) of the cage bushing (1).
  3. Rolling bearing according to claim 2, characterised in that the cage bushing (1) comprises spring lips (21) each of which extends into one of the recesses (3) and acts in radial direction of the bushing on the snapped-in knob (19).
  4. Rolling bearing according to claim 1, characterised in that a plurality of parallel raceways (10) for balls (8) of load-bearing sections are configured on a load-bearing raceway element (9).
  5. Rolling bearing according to claim 1, characterised in that the outer cage part (12) of the segmental cage housing (6, 7) is configured as a plastic part injected onto the load-bearing raceway element (9).
  6. Rolling bearing according to claim 1, characterised in that the segmental cage housing consisting of an outer cage part and an inner cage part is injected as a one-piece plastic part onto the load-bearing raceway element.
  7. Rolling bearing according to claim 2, characterised in that the cage bushing comprises two end rings (24, 28) that extend in planes perpendicular to the longitudinal direction of the guide rail (2), pairs of substantially parallel slots (25, 26) that form resilient regions (22, 23) being provided on each end ring (24, 28), and each segmental cage housing (6, 7) being retained with its two ends pointing in the longitudinal direction of the guide rail (2) by two corresponding resilient regions (22, 23) of the two end rings (24, 28).
  8. Rolling bearing according to claim 7, characterised in that the segmental cage housings (6, 7) are retained in the cage bushing by their end knobs (19) that are inserted into openings (27) of the resilient regions (22).
  9. Rolling bearing according to claim 7, characterised in that that the load-bearing raceway elements are fixed on the resilient regions (23) of the cage bushing by gluing or welding end surfaces.
  10. Rolling bearing according to claim 1, characterised in that, in the region of a load-bearing section of the balls (8) and/or in the region of a returning section of the balls (13), the segmental cage housings (7) comprise hollow spaces (17, 18) that can be used as grease reservoirs.
  11. Rolling bearing according to claim 1, characterised in that the inner cage part (11) comprises side recesses (15) into which side knobs (16) of the outer cage part (12), that is inserted into the inner cage part (11), are snapped.
EP00947952A 1999-08-06 2000-07-07 Linear roller bearing Expired - Lifetime EP1200749B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19937278A DE19937278A1 (en) 1999-08-06 1999-08-06 Linear roller bearings
DE19937278 1999-08-06
PCT/EP2000/006477 WO2001011251A1 (en) 1999-08-06 2000-07-07 Linear roller bearing

Publications (2)

Publication Number Publication Date
EP1200749A1 EP1200749A1 (en) 2002-05-02
EP1200749B1 true EP1200749B1 (en) 2004-01-21

Family

ID=7917531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00947952A Expired - Lifetime EP1200749B1 (en) 1999-08-06 2000-07-07 Linear roller bearing

Country Status (6)

Country Link
US (1) US6619844B1 (en)
EP (1) EP1200749B1 (en)
JP (1) JP4388722B2 (en)
CN (1) CN1120307C (en)
DE (2) DE19937278A1 (en)
WO (1) WO2001011251A1 (en)

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Also Published As

Publication number Publication date
JP4388722B2 (en) 2009-12-24
DE50005093D1 (en) 2004-02-26
CN1120307C (en) 2003-09-03
CN1358258A (en) 2002-07-10
EP1200749A1 (en) 2002-05-02
US6619844B1 (en) 2003-09-16
JP2003506647A (en) 2003-02-18
WO2001011251A1 (en) 2001-02-15
DE19937278A1 (en) 2001-02-08

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